Collaborative Research: Spatiotemporal Evolution of the Neogene Ignimbrite Flare-up in the Altiplano-Puna Volcanic Complex, Central Andes: Insights into the Development of Large

合作研究：安第斯山脉中部高原-普纳火山群中新近纪火辉岩爆发的时空演化：深入了解大型火山岩的发展

• 批准号: 0538159
• 负责人: Bradley Singer
• 金额: $ 10.04万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-04-15 至 2009-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0538159&HistoricalAwards=false
• 关键词: Collaborative; Research; Spatiotemporal; Evolution; Neogene

This collaborative project is supported by the Petrology and Geochemistry program (in Earth Sciences), the Americas Program (in the Office of International Science and Engineering), and the EPSCoR program. The central focus of the research will be to better define the timing, pattern, and volume of ignimbrite volcanism in the Altiplano-Puna Volcanic Complex (APVC) of the Central Andes to address fundamental, yet persistent, questions about how large magmatic systems develop and evolve. The investigators hope to understand if the magmatic activity that led to the formation of this volcanic complex was truly episodic or if this initial impression is a function of incomplete characterization of the chronology of explosive events. Also, if episodic, what was the frequency and size of successive eruptions and what was the spatial pattern of the eruption series. They will address these questions by establishing a stratigraphic and volcanological framework for the major part of the APVC in the Lipez region of SW Bolivia through field mapping, 40Ar/39Ar geochronology, and geochemical and paleomagnetic (NRM) correlation techniques. This record will be correlated into the adjacent parts of the APVC in Chile and Argentina where a more coherent framework exists. These data, combined with knowledge of the petrogenesis and evolution of the magmas, will form the critical baseline from which magma production and intrusion rates can be calculated. Integration of these data into a regional GIS will facilitate a quantitative spatiotemporal analysis.Broader impacts of this project include training of a Ph.D. student in a variety of ignimbrite correlation techniques and modern 40Ar/39Ar geochronology methods. Undergraduate students will be involved in paleomagnetic analytical work and fieldwork. The findings will be disseminated to K-12 educators, non-traditional students, and the general public through the VolcanoWorld web site (http://volcano.und.nodak.edu/vw.html) and synergistic activities. Scientific results will be disseminated in a timely fashion to professional peer-groups and should have societal impact in furthering our understanding of episodic activity in large, explosive volcanic systems that are of concern for hazard mitigation programs. The close collaboration with a Bolivian colleague and a student ensures training, data and knowledge transfer, and consolidation of international cooperative research. Collaboration with an Argentine colleague will aid the process of correlation across the international border.

该合作项目由岩石学和地球化学计划（地球科学），美洲计划（国际科学与工程办公室）和EPSCoR计划支持。 该研究的中心重点将是更好地确定时间，模式和量的熔结凝灰岩火山作用在中央安第斯山脉的高原普纳火山杂岩（APVC），以解决基本的，但持久的问题，如何大岩浆系统的发展和演变。 研究人员希望了解导致这一火山复合体形成的岩浆活动是否真的是偶发性的，或者这种最初的印象是否是对爆炸事件年表的不完整描述的函数。此外，如果是偶发性的，连续喷发的频率和规模是多少，喷发系列的空间模式是什么。他们将通过野外测绘、40 Ar/39 Ar地质年代学以及地球化学和古地磁（NRM）对比技术，为玻利维亚西南部利佩兹地区APVC的主要部分建立地层和火山学框架，从而解决这些问题。这一记录将与智利和阿根廷的APVC相邻部分相关联，那里有一个更连贯的框架。 这些数据，结合岩石成因和岩浆演化的知识，将形成计算岩浆产生和侵入速率的关键基线。 将这些数据集成到区域地理信息系统中将有助于进行定量的时空分析。学生学习各种熔结凝灰岩对比技术和现代40 Ar/39 Ar地质年代学方法。 本科生将参与古地磁分析工作和野外工作。调查结果将通过VolcanoWorld网站（http：//volcano.und.volcanak.edu/vw.html）和协同活动向K-12教育工作者、非传统学生和一般公众传播。科学结果将及时传播给专业同行团体，并应产生社会影响，促进我们对大型爆炸性火山系统中的偶发活动的理解，这些火山系统是减灾计划所关注的。与一位玻利维亚同事和一名学生的密切合作确保了培训、数据和知识转让以及国际合作研究的巩固。与一位阿根廷同事的合作将有助于跨越国际边界的相互关联进程。